US4168633A - Panoramic dental X-ray machine base excursion drive assembly - Google Patents
Panoramic dental X-ray machine base excursion drive assembly Download PDFInfo
- Publication number
- US4168633A US4168633A US05/856,423 US85642377A US4168633A US 4168633 A US4168633 A US 4168633A US 85642377 A US85642377 A US 85642377A US 4168633 A US4168633 A US 4168633A
- Authority
- US
- United States
- Prior art keywords
- rotating disc
- column
- sprocket
- belt
- base member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000002455 dental arch Anatomy 0.000 claims abstract description 4
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 210000001738 temporomandibular joint Anatomy 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000009877 rendering Methods 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0478—Chairs
-
- A61B6/51—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18544—Rotary to gyratory
Definitions
- the present invention relates to X-ray apparatus for taking panoramic radiographs of dental arch and temporomandibular joint areas and more particularly concerns apparatus which causes a column carrying an X-ray tubehead and camera to orbit about a patient in a smooth and vibrationless manner.
- FIG. 1 is a perspective view of dental X-ray apparatus embodying the invention.
- FIG. 2 is a cutaway perspective view of a portion of the base and excursion mechanism of the embodiment shown in FIG. 1.
- FIG. 3 is a sectional view of another portion of the base and excursion mechanism.
- FIG. 4 is a plan view, partially in section, of the excursion mechanism with portions removed for clarity.
- FIG. 5 is a sectional view of the belt-fastening means used in the excursion mechanism.
- the panoramic X-ray apparatus comprises a base B which supports and partially houses the excursion mechanism of the invention.
- a stationary platform P is disposed generally centrally of the base B, the platform carrying a patient chair 14 including means 16 for supporting the chin and head of a patient.
- a column 18 is caused to rotate around chair 14 by means of the excursion mechanism.
- Column 18 includes a tubehead 20, a camera supporting arm 22 and a camera 24 which includes the usual film holding means.
- Outer race 36 includes a lower flange 38 which is secured to base plate 30 by circumferentially spaced screws 40.
- upper flange 42 of inner race 34 carries rotating disc 44.
- Upper flange 42 and rotating disc 44 rotate as a unit and are held together by means of circumferentially spaced shoulder screws 46.
- Rotating disc 44 carries column 18 which is provided with a horizontal plate member 48, upon which is mounted a synchronous step motor 50 by means of brackets 52.
- An opening 54 is provided in horizontal plate 48 through which shaft 56 of motor 50 communicates with conventional electromagnetic slip clutch 58.
- Clutch 58 serves to couple shaft 56 with sprocket 60 which is rotatably mounted to rotating disc 44.
- Sprocket 60 is provided with teeth 62 which coact with spaced projections 64 on a belt 66.
- the belt is accommodated within with an annulus 68 provided around stationary platform 70 which supports the patient chair 14.
- belt 66 does not rotate around platform 70.
- Belt 66 is held immovable against annulus 68 at that portion of the annulus farthest removed from sprocket 60 by means to be described more fully hereinafter.
- any given point on belt 66 such as point E (FIG. 4) for example, will always contact a specified point, and no other point, on annulus 68 provided around platform 70, such as point F, regardless of the direction of rotation of rotating disc 44.
- Belt 66 provides the means therefore for translating the rotation of sprocket 60 into orbital rotation of rotating disc 44 and column 18.
- a fixed idler pulley 72 is rotatably mounted to rotating disc 44, while an adjustable idler pulley assembly 74 (FIG. 4) is pivotally mounted to rotating disc 44, both pulleys cooperating to maintain proper tension of belt 66 against sprocket 60 and annulus 68.
- Platform 70 is fixedly secured to base plate 30 by screws 76.
- a flexible electric cable 80 passes up through column 18 for connecting the power source to the X-ray source and camera, and to the motor (not shown) which elevates or lowers the tubehead assembly in column 18.
- the cable is also connected to motor 50, slip clutch 58, and a microswitch assembly to be later described.
- cable 80 will be provided with a sufficient length.
- a space 82 is provided above base plate 30 to permit coiling and uncoiling of cable 80 during movement of the tubehead and column.
- a cable control band 84 is mounted to an underside portion of rotating disc 44 for restricting cable 80 within space 82.
- a removable cover plate or step plate 85 suitably an aluminum casting, protects the excursion mechanism as well as affording means upon which the patient may step and rest his feet.
- Step plate 85 is removably attached to stationary platform 70 by screws 86.
- Leveling screws 88 are provided in base plate 30.
- FIGS. 3 and 4 wherein a balancing weight 90, suitably cast iron, is shown seated on an outer portion of rotating disc 44, the weight 90 being positioned in counterbalancing relation to column 18. Screws 92 maintain balance weight 90 in a fixed position on rotating disc 44.
- An annular ring 94 upstands from rotating disc 44 and carries a pair of cams 96 and 96' which respectively actuate microswitches 98 and 98' to limit the total excursion of rotating disc 44 to about 240°.
- Microswitches 98 and 98' are carried on a switch plate 100 mounted on stationary platform 70.
- cam 96 when rotating disc 44 moves in a counterclockwise direction, switch 98 will be actuated by cam 96 to open the circuit to motor 50. Conversely, cam 96' actuates limit switch 98' when rotating disc 44 moves in a clockwise direction to open the circuit to motor 50. Cams 96 and 96' are so positioned that column 18 and rotating disc 44 are permitted about 240° of rotation in either direction. Circuitry for the cam-microswitch arrangement is conventional and are not detailed herein.
- Adjustable idler pulley assembly 74 comprises an idler wheel 110 rotatable on arm 112 which is pivotally mounted to rotating disc 44 by screw 114.
- a holder 116 is slidably insertable through a nut 118 which is fixedly secured to rotating disc 44.
- idler wheel 110 will be displaced inwardly to increase tension on belt 66 when screw 120 is tightened against compression spring 122 to cause arm 112 to pivot clockwise on screw 114 by means of pivot pin 124.
- Step plate 85 is provided with a recess 130 for receiving a removable access plate 132 for easy access to switch plate 100.
- a skirt 134 extends around rotating disc 44, and is mounted thereto by screws 136 while a step plate support member 138 is bolted to base plate 30.
- a step plate cover 140 preferably rubber or vinyl, is fitted over the step plate.
- a clamp 144 may be employed to secure cable 80 against base plate 30.
- Rotating disc 44 may be provided with removable wings 146 to enable passage of the X-ray machine through restricted openings.
- Annulus 68 of stationary platform 70 has a cut-out area, or notched recess 150 for receiving a belt-fastening assembly 152 therewithin (FIG. 5) comprising an outer plate 154 and an inner plate 156 which includes grooves 158 for accepting projections 64 of belt 66.
- the plates 154 and 156 are secured together by screws 160.
- any rotary motion of shaft 56 of motor 50 will not be coupled to sprocket 60 until sufficient voltage is supplied to the coils of clutch 58. That is, the clutch will be permitted to "slip” until actuated. However, once actuated by a sufficient voltage, rotation of sprocket 60 will be effected. Since belt 66 is held fast against annulus 68 in the vicinity where belt-fastening assembly 152 engages notched recess 150 provided in stationary platform 70, rotation of the sprocket causes column 18 and rotating disc 44 to orbit around the stationary patient platform.
- belt 66 will translate the rotational movement of sprocket 60 into a clockwise or counterclockwise excursion of the column depending upon the direction of rotation of the sprocket. More specifically, rotation of sprocket 60 in a clockwise direction causes column 18 and rotating disc 44 to orbit in an opposite direction, and vice-versa.
- step motor 50 is geared down by conventional means to permit 1.83 rpm of the column and rotating disc.
Abstract
Description
Claims (10)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/856,423 US4168633A (en) | 1977-12-01 | 1977-12-01 | Panoramic dental X-ray machine base excursion drive assembly |
CA315,421A CA1099827A (en) | 1977-12-01 | 1978-10-31 | Panoramic dental x-ray machine base excursion drive assembly |
NL7811318A NL7811318A (en) | 1977-12-01 | 1978-11-16 | MOVEMENT MECHANISM FOR A PANORAMIC ROENTGEN UNIT. |
GB7844713A GB2009363B (en) | 1977-12-01 | 1978-11-16 | Excursion mechanism for panoramic dental x-ray machine |
FR787833800A FR2410468B1 (en) | 1977-12-01 | 1978-11-30 | EXCURSION MECHANISM FOR DENTAL RADIOGRAPHY APPARATUS |
JP14734778A JPS5486289A (en) | 1977-12-01 | 1978-11-30 | Mechanism for moving panoramic xxray machine |
BE192054A BE872421A (en) | 1977-12-01 | 1978-11-30 | ANGULAR DISPLACEMENT MECHANISM FOR AN X-RAY MACHINE FOR PANORAMIC EXAMINATION OF TEETH |
FI783671A FI69708C (en) | 1977-12-01 | 1978-11-30 | ROTATIONSMEKANISM FOER DENTALROENTGENAPPARAT FOER PANORAMABILDER |
IT52138/78A IT1106113B (en) | 1977-12-01 | 1978-11-30 | EXCURSION MECHANISM FOR PANORAMIC DENTAL RADIOGRAPHIC EQUIPMENT |
DE19782852119 DE2852119A1 (en) | 1977-12-01 | 1978-12-01 | PENDULUM MECHANISM FOR PANORAMIC DENTAL X-RAY UNITS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/856,423 US4168633A (en) | 1977-12-01 | 1977-12-01 | Panoramic dental X-ray machine base excursion drive assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
US4168633A true US4168633A (en) | 1979-09-25 |
Family
ID=25323591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/856,423 Expired - Lifetime US4168633A (en) | 1977-12-01 | 1977-12-01 | Panoramic dental X-ray machine base excursion drive assembly |
Country Status (10)
Country | Link |
---|---|
US (1) | US4168633A (en) |
JP (1) | JPS5486289A (en) |
BE (1) | BE872421A (en) |
CA (1) | CA1099827A (en) |
DE (1) | DE2852119A1 (en) |
FI (1) | FI69708C (en) |
FR (1) | FR2410468B1 (en) |
GB (1) | GB2009363B (en) |
IT (1) | IT1106113B (en) |
NL (1) | NL7811318A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5793837A (en) * | 1995-02-08 | 1998-08-11 | Mezhinsky; Victor B. | Apparatus and method for X-ray tomography |
US6119287A (en) * | 1998-05-29 | 2000-09-19 | Phillips; Barry S. | Lift and transfer apparatus for a disabled person |
USD667120S1 (en) * | 2010-11-24 | 2012-09-11 | General Electric Company | Molecular imaging scanner |
USD667119S1 (en) * | 2010-11-23 | 2012-09-11 | General Electric Company | Magnetic resonance limb scanner |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1168071A (en) * | 1914-09-14 | 1916-01-11 | John E Mathews | Barber's chair. |
US1337059A (en) * | 1917-08-08 | 1920-04-13 | John A Mayne | Revolving chair |
US2613726A (en) * | 1947-03-19 | 1952-10-14 | Paatero Yrjo Veli | Chair for use in x-ray photographing of teeth |
US2684446A (en) * | 1950-11-04 | 1954-07-20 | Paatero Yrjo Veli | Method of and apparatus for X-ray photographing curved surfaces, especially for medical purposes |
US3481160A (en) * | 1967-12-11 | 1969-12-02 | Walter L Georgi | Slip clutch |
US3743832A (en) * | 1968-11-06 | 1973-07-03 | Gen Electric | Apparatus for producing radiographs of curved planes in an object |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1557763A (en) * | 1967-12-05 | 1969-02-21 | ||
US4125774A (en) * | 1977-12-01 | 1978-11-14 | Pennwalt Corporation | Panoramic dental x-ray machine |
-
1977
- 1977-12-01 US US05/856,423 patent/US4168633A/en not_active Expired - Lifetime
-
1978
- 1978-10-31 CA CA315,421A patent/CA1099827A/en not_active Expired
- 1978-11-16 GB GB7844713A patent/GB2009363B/en not_active Expired
- 1978-11-16 NL NL7811318A patent/NL7811318A/en not_active Application Discontinuation
- 1978-11-30 FI FI783671A patent/FI69708C/en not_active IP Right Cessation
- 1978-11-30 BE BE192054A patent/BE872421A/en not_active IP Right Cessation
- 1978-11-30 JP JP14734778A patent/JPS5486289A/en active Pending
- 1978-11-30 IT IT52138/78A patent/IT1106113B/en active
- 1978-11-30 FR FR787833800A patent/FR2410468B1/en not_active Expired
- 1978-12-01 DE DE19782852119 patent/DE2852119A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1168071A (en) * | 1914-09-14 | 1916-01-11 | John E Mathews | Barber's chair. |
US1337059A (en) * | 1917-08-08 | 1920-04-13 | John A Mayne | Revolving chair |
US2613726A (en) * | 1947-03-19 | 1952-10-14 | Paatero Yrjo Veli | Chair for use in x-ray photographing of teeth |
US2684446A (en) * | 1950-11-04 | 1954-07-20 | Paatero Yrjo Veli | Method of and apparatus for X-ray photographing curved surfaces, especially for medical purposes |
US3481160A (en) * | 1967-12-11 | 1969-12-02 | Walter L Georgi | Slip clutch |
US3743832A (en) * | 1968-11-06 | 1973-07-03 | Gen Electric | Apparatus for producing radiographs of curved planes in an object |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5793837A (en) * | 1995-02-08 | 1998-08-11 | Mezhinsky; Victor B. | Apparatus and method for X-ray tomography |
US6119287A (en) * | 1998-05-29 | 2000-09-19 | Phillips; Barry S. | Lift and transfer apparatus for a disabled person |
USD667119S1 (en) * | 2010-11-23 | 2012-09-11 | General Electric Company | Magnetic resonance limb scanner |
USD667120S1 (en) * | 2010-11-24 | 2012-09-11 | General Electric Company | Molecular imaging scanner |
Also Published As
Publication number | Publication date |
---|---|
BE872421A (en) | 1979-03-16 |
IT7852138A0 (en) | 1978-11-30 |
DE2852119A1 (en) | 1979-06-07 |
GB2009363A (en) | 1979-06-13 |
FR2410468B1 (en) | 1985-07-26 |
CA1099827A (en) | 1981-04-21 |
IT1106113B (en) | 1985-11-11 |
FI783671A (en) | 1979-06-02 |
GB2009363B (en) | 1982-05-26 |
JPS5486289A (en) | 1979-07-09 |
FI69708B (en) | 1985-11-29 |
NL7811318A (en) | 1979-06-06 |
FR2410468A1 (en) | 1979-06-29 |
FI69708C (en) | 1986-03-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: S.S. WHITE COMPANY, THE, 100 SOUTH STREET, HOLMDEL Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PENNWALT CORPORATION A PA. CORP;REEL/FRAME:004288/0006 Effective date: 19840715 Owner name: S.S. WHITE COMPANY, THE,NEW JERSEY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PENNWALT CORPORATION A PA. CORP;REEL/FRAME:004288/0006 Effective date: 19840715 |
|
AS | Assignment |
Owner name: KEYSTONE X-RAY, INC., PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:S.S. WHITE COMPANY, THE;REEL/FRAME:005725/0001 Effective date: 19880330 |